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Register Key Press

According to a dictionary ( oxforddictionaries.com/us/definition/american_english/register ), the verb "register" could mean "detect and show". So, this:

"The radar registered an aircraft."

is good English, because a radar can certainly "detect and show" an aircraft. But in some computer science literature, phrases like this are found:

"The computer didn't register the key press."

Certainly, a computer can "detect" a key press. But a computer doesn't really show a key press. It might process a key press though. So, could it be that "register", in computer science context, is hijacked to mean "detect and process"?